482
FXUS65 KBYZ 292133
AFDBYZ
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE BILLINGS MT
333 PM MDT MON JUN 29 2026
KEY MESSAGES
- IMPACTS FROM HIGH ELEVATION MOUNTAIN SNOW WILL COME TO AN END
THIS EVENING AS SNOW LEVELS RISE.
- WIND GUSTS TODAY OF 40-55 MPH ALONG THE WESTERN FOOTHILLS, AND
30-40 MPH FURTHER EAST.
- RETURN TO SEASONABLE TEMPERATURES BEGINNING TUESDAY.
- INCREASING THUNDERSTORM POTENTIAL WEDNESDAY THROUGH FRIDAY;
STRONG TO SEVERE STORMS POSSIBLE.
UPDATED AVIATION DISCUSSION
DISCUSSION
TODAY THROUGH SUNDAY...
AN UPPER LEVEL LOW CURRENTLY OVER CENTRAL MT CONTINUES TO BRING
PRECIPITATION TO WESTERN AND CENTRAL MT. THIS LOW IS PROJECTED TO
MOVE NORTHEAST THROUGH THE EVENING, BRINGING LOW TO MODERATE
PRECIPITATION CHANCES ACROSS SOUTH-CENTRAL MT THROUGH THE
AFTERNOON AND EARLY EVENING. ISOLATED SHOWERS AND THUNDERSTORMS
ARE POSSIBLE EARLY AFTERNOON ACROSS EAST CENTRAL MT AS LOW CAPE
VALUES EXIST THERE. ADDITIONALLY, WITH THE LOW OVERHEAD AND
EXITING NORTHEAST, GUSTY WESTERLY WINDS 30-40 MPH WILL TRACK INTO
EASTERN MT THROUGH THE OVERNIGHT HOURS. AS THE LOW EXITS THE
REGION, HEIGHTS WILL BEGIN TO RISE, INCREASING SNOW LEVELS. THIS
WILL ALLOW FOR SNOW TO TRANSITION TO RAIN AS PRECIPITATION TAPERS
OFF THIS EVENING. INTO TUESDAY, TEMPERATURES WILL BEGIN TO REBOUND
TO THE 70S AND LOW 80S WITH ONLY ISOLATED SHOWERS EXPECTED OVER
THE HIGHER TERRAIN. WEDNESDAY THROUGH FRIDAY WILL BRING ABOUT
MULTIPLE SHORTWAVE DISTURBANCES, ALLOWING FOR DAILY CHANCES OF
AFTERNOON SHOWERS AND THUNDERSTORMS. NONE OF THESE DAYS SHOW
PARTICULARLY STRONG FORCING, BUT WILL BE SOMETHING TO KEEP AN EYE
ON FOR STRONG TO SEVERE THUNDERSTORM POTENTIAL. INTO THE WEEKEND,
ENSEMBLES ARE IN GOOD AGREEMENT FOR RIDGING TO TAKE PLACE,
ALLOWING FOR MILD AND WARM CONDITIONS. TEMPERATURES WILL REMAIN
CONSISTENT THROUGH THE WEEKEND, GENERALLY IN THE 70S AND 80S. TS
AVIATION
2130Z UPDATE...ISOLATED THUNDERSTORMS MAY IMPACT TERMINALS EAST
OF KBIL THIS AFTERNOON (21Z TO 00Z), SPECIFICALLY KMLS TO KBHK.
THE MAIN IMPACTS WITH ANY STORMS WILL BE HEAVY RAINFALL, SMALL
HAIL, AND ERRATIC WIND GUSTS.
SCATTERED SHOWERS CONTINUE TO SPREAD FROM WEST TO EAST THIS
AFTERNOON. LOOK FOR MVFR TO IFR CONDITIONS UNDER HEAVIER SHOWERS.
GUSTY WNW WINDS OF 25 TO 40 KNOTS WILL CONTINUE TO SPREAD EASTWARD
AS WELL, BEFORE DECREASING OVERNIGHT FOR MOST TERMINALS. LOOK FOR
PRECIPITATION TO END THIS EVENING AS WELL. EXPECT MOUNTAIN
OBSCURATIONS THROUGH THE PERIOD WITH SNOW SHOWERS. MATOS
PRELIMINARY POINT TEMP/POPS
TDY TUE WED THU FRI SAT SUN
-------------------------------------------------------
BIL 065 054/078 053/082 054/084 057/083 055/082 057/088
5/W 10/U 11/U 41/U 23/T 41/U 00/U
LVM 056 044/072 045/076 045/078 048/078 046/080 049/086
8/T 52/T 16/T 63/T 27/T 61/U 00/U
HDN 070 053/080 052/084 053/086 055/086 054/083 055/089
4/W 10/U 11/U 21/U 13/T 51/U 00/U
MLS 073 052/079 053/084 057/087 058/087 057/082 056/088
3/T 10/N 11/U 11/B 24/T 42/T 10/U
4BQ 075 053/079 054/083 056/087 058/088 057/081 056/087
1/B 00/U 22/T 12/T 24/T 43/T 11/U
BHK 075 048/077 051/082 054/086 055/087 055/080 052/085
3/T 10/N 02/T 13/T 25/T 63/T 11/U
SHR 070 045/076 048/081 051/084 052/084 051/080 050/087
1/E 11/U 22/T 12/T 13/T 43/T 11/U
BYZ WATCHES/WARNINGS/ADVISORIES
MT...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM MDT THIS EVENING
FOR ZONE 67.
WY...NONE.
WEATHER.GOV/BILLINGS
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